Answer:
The correct option is A.
Explanation:
As we know that genetic variation that result from crossing over depend on the number of genes and their alleles. When there are more genes in genome the chances of polymorphic loci will increase, which will result into more genetic variation during crossing over.
Forexample:
Drosophila melanogaster is a common fruit fly having diploid number of 8 chromosome composed of 122,653,977 base pairs, and about ~17,000 genes. Honey bees have diploid number of 32 chromosomes composed of approximately 2360000 base pairs, and 10,000 genes.
Conclusion:
As fruit fly genome contain more genes and polymorphic loci, so genetic variation is more likely to be greater in fruit fly.
The new species come from old ancestors of the animals that were there, over time they slowly evolved, and they adapted to that new environment.
Answer:
The phosphorus in all biological tissues can be traced back to phosphorus weathered from rock.
B, D, and E.
the other three don't have a major effect
The answer is; When the planet is at A it is moving faster than at B.
This is because when the planet is closer to the sun at point A, it is experiencing a stronger gravitation, by the sun, pull than at point B. Therefore, its acceleration due to gravity at point A is higher than at point B.
